Facebook PHP SDK访问令牌问题，当检索用户配置文件通过图形API

Question

我试图在我的网站检索用户配置文件。但我拿到访问令牌后，就不能用了。它显示的结果是

Graph returned an error: Invalid OAuth access token

我可以通过以下代码

获得访问令牌

login。

session_start();
require_once __DIR__ . '/facebook-php-sdk-v4-5.0-dev/src/Facebook/autoload.php';
$fb = new FacebookFacebook([
  'app_id' => 'I have insert correct app id',
  'app_secret' => 'and app secret',
  'default_graph_version' => 'v2.0',
  ]);
$helper = $fb->getRedirectLoginHelper();
$permissions = ['email'];
$loginUrl = $helper->getLoginUrl('http://myweb.com/login-callback.php', $permissions);
echo '<a href="' . htmlspecialchars($loginUrl) . '">Log in with Facebook!</a>';
?>

下面是login-callback.php

<?php
session_start();
require_once __DIR__ . '/facebook-php-sdk-v4-5.0-dev/src/Facebook/autoload.php';
$fb = new FacebookFacebook([
  'app_id' => 'I have insert correct app id',
  'app_secret' => 'and app secret',
  'default_graph_version' => 'v2.0',
  ]);
  $helper = $fb->getRedirectLoginHelper();
  try {
    $accessToken = $helper->getAccessToken();
  } catch(FacebookExceptionsFacebookResponseException $e) {
    echo 'Graph returned an error: ' . $e->getMessage();
    exit;
  } catch(FacebookExceptionsFacebookSDKException $e) {
    echo 'Facebook SDK returned an error: ' . $e->getMessage();
    exit;
  }
  if (! isset($accessToken)) {
    if ($helper->getError()) {
      header('HTTP/1.0 401 Unauthorized');
      echo "Error: " . $helper->getError() . "n";
      echo "Error Code: " . $helper->getErrorCode() . "n";
      echo "Error Reason: " . $helper->getErrorReason() . "n";
      echo "Error Description: " . $helper->getErrorDescription() . "n";
    } else {
      header('HTTP/1.0 400 Bad Request');
      echo 'Bad request';
    }
    exit;
  }
  $_SESSION['fb_access_token'] = (string) $accessToken;
  try {
    $response = $fb->get('/me?fields=id,name', "'".$_SESSION['fb_access_token']."'");
  } catch(FacebookExceptionsFacebookResponseException $e) {
    echo 'Graph returned an error: ' . $e->getMessage();
    exit;
  } catch(FacebookExceptionsFacebookSDKException $e) {
    echo 'Facebook SDK returned an error: ' . $e->getMessage();
    exit;
  }
  $user = $response->getGraphUser();
  echo 'Name: ' . $user['name'];
  ?>

我做错了什么吗?请帮助。谢谢。

Answer 1

我只有:

$response = $fb->get('/me?fields=id,name', $token);
$user = $response->getGraphUser();

效果很好

Answer 2

我认为你应该改变你的代码:"'".$_SESSION['fb_access_token']."'"到$accessToken再试一次